Identity-based cryptosystems and signature schemes
Proceedings of CRYPTO 84 on Advances in cryptology
A digital signature scheme secure against adaptive chosen-message attacks
SIAM Journal on Computing - Special issue on cryptography
Random oracles are practical: a paradigm for designing efficient protocols
CCS '93 Proceedings of the 1st ACM conference on Computer and communications security
Proceedings of the 4th ACM conference on Computer and communications security
CRYPTO '00 Proceedings of the 20th Annual International Cryptology Conference on Advances in Cryptology
Identity-Based Encryption from the Weil Pairing
CRYPTO '01 Proceedings of the 21st Annual International Cryptology Conference on Advances in Cryptology
ASIACRYPT '01 Proceedings of the 7th International Conference on the Theory and Application of Cryptology and Information Security: Advances in Cryptology
Applications of Multiple Trust Authorities in Pairing Based Cryptosystems
InfraSec '02 Proceedings of the International Conference on Infrastructure Security
The HP time vault service: exploiting IBE for timed release of confidential information
WWW '03 Proceedings of the 12th international conference on World Wide Web
Time-lock Puzzles and Timed-release Crypto
Time-lock Puzzles and Timed-release Crypto
Encapsulated Key Escrow
Breaking and repairing optimistic fair exchange from PODC 2003
Proceedings of the 3rd ACM workshop on Digital rights management
Scalable, Server-Passive, User-Anonymous Timed Release Cryptography
ICDCS '05 Proceedings of the 25th IEEE International Conference on Distributed Computing Systems
Timed release of standard digital signatures
FC'02 Proceedings of the 6th international conference on Financial cryptography
Aggregate and verifiably encrypted signatures from bilinear maps
EUROCRYPT'03 Proceedings of the 22nd international conference on Theory and applications of cryptographic techniques
FC'05 Proceedings of the 9th international conference on Financial Cryptography and Data Security
Efficient identity-based encryption without random oracles
EUROCRYPT'05 Proceedings of the 24th annual international conference on Theory and Applications of Cryptographic Techniques
Optimistic fair exchange of digital signatures
IEEE Journal on Selected Areas in Communications
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Time Capsule Signature, first formalized by Dodis and Yum in Financial Cryptography 2005, is a digital signature scheme which allows a signature to bear a (future) time t so that the signature will only be valid at time t or later, when a trusted third party called time server releases time-dependent information for checking the validity of a time capsule signature. Also, the actual signer of a time capsule signature has the privilege to make the signature valid before time t. In this paper, we provide a new security model of time capsule signature such that time server is not required to be fully trusted. Moreover, we provide two efficient constructions in random oracle model and standard model. Our improved security model and proven secure constructions have the potential to build some new E-Commerce applications.